warning light MERCEDES-BENZ E-CLASS CABRIOLET 2021 Owner's Guide

Wa
rning/indicat orlam p
Possible causes/conseq uencesand0050 0050
Solutions
00E9 Seat beltwarning lam p
light sup *T
he redseat beltwarning lam plight sup forsix seconds oncetheengine hasstar ted.
In addition, anintermitt entwarning tone maysou nd.
The redseat beltwarning lam pre minds thedr iver and front passeng ertofasten their seat belts. #
Fasten your seat belt(/page40 ).
If yo uha ve placed objectson thefront passeng erseat, there dseat beltwarning lam pma yre main lit. Ve
hicl e Wa
rning/indicat orlam p
Possible causes/conseq uencesand0050 0050
Solutions
Ù Po we rst eer ing warning
lam p(red) *T
he redpo we rst eer ing system warning lam pis lit while theengine isrunning .
The powe rassi stanc eor thesteer ing itself ismalfunct ioning. &
WARNIN GRisk ofacci dent ifsteer ing capability isim pair ed
If th esteer ing does notfunc tion asintended, theve hicle's operating safetyis jeopar dized. #
Pull overand stop theve hicle safely assoon aspossible, paying attention toroad and traf fic condi tions.Do
no tcontinu edr ivi ng und eranycir cums tances. #
Consu ltaqu alif ied spec ialistwo rkshop. #
Notethemessag eson themultifunc tiondispla y. Dis
play messa gesand warning/ indic ator lam ps 395

Wa
rning/indicat orlam p
Possible causes/conseq uencesand0050 0050
Solutions
If th ecoolant temp eratur edispla yis at thelowe rend ofthete mp eratur escale: #
Consult aqu alif ied spec ialistwo rkshop.
If th ecoolant temp eratur edispla yis at theupper endofthete mp eratur escale: #
Exitth eve hicle andkeep asaf edis tance from itunti lth eengine hascooled down. #
Chec kth ecoolant leve l(/ page269) . #
Mak esur eth at theair supply tothera diat orisno tobs truct ed. #
Avoiding highloads ontheengine, drive to thenear estqu alif ied spec ialistwo rkshop. Indoing so,ensur eth at the
cool anttemp eratur edispla yre mains belowthere dar ea.
ÿ Coolant warning lam p(yel‐
lo w) *T
he yello wcoolan twa rning lam pis lit while theengine isrunning .
Po ssible causes:
R The temp eratur esensor ismalfunct ioning
R The charge air,tr ans miss ionoilorbat tery cool ingisfaulty #
Avoiding highloads ontheengine, drive to thenear estqu alif ied spec ialistwo rkshop.
00B9
Engine diagnosis warning
lam p *T
he yello wChec kEn gine warning lam pis lit while theengine isrunning .
A ma lfunctio nha soccu rred intheengine, theex haus tsy stem orthefuel system.
The emission limitvalues maybe exc eeded andtheengine maybe inemer gency mod e.
In som est at es, legalrequ iremen tsstipulat eth at youmus timm ediat elyco nsult aqu alif ied spec ialistwo rkshop as
soon astheye llo wChec kEn gine warning lam plight sup. Disp
lay mess ages and warning/ indic ator lam ps 39
7

Wa
rning/indicat orlam p
Possible causes/conseq uencesand0050 0050
Solutions #
Have theve hicle checkedas soon aspossible ataqu alif ied spec ialistwo rkshop.
003D Electr icalmalfunction warn‐
ing lam p *T
heredelect rical fault warning lam pis lit.
Ther eis afa ult intheelectr ics. #
Notethemessag eson themultifunc tiondispla y.
00B6
Fu elreser vewarning lam p
fl ashes *T
he yello wfuel reser vewarning lam plight sup while youar edr ivin g.
Ther ehas been press ureloss inthefuel system. Thefuel filler cap isno tclos edcor rectl yor thefuel system isleak‐
ing. #
Close thefuel filler cap.
If th efuel filler cap hasalready been closedcor rectl y: #
Consul ta qu alif ied spec ialistwo rkshop.
00B6 Fu elreser vewarning lam p
light sup *T
he yello wfuel reser vewarning lam plight sup while theengine isrunning .
The fuelsu pp lyhas dropped intoth ere ser verang e. #
Refuel . 398
Displaymessa gesand warning/ indic ator lam ps

Br
ak es Wa
rning/indicat orlam p
Possible causes/conseq uencesand0050 0050
Solutions
0049 Elect ric pa rking brak eindi‐
cat orlam p(red) (USAonl y)
0024
Elec tric par kingbr ak eindi‐
cat orlam p(red) (Canada
onl y)
0024 The elect ric pa rking brak e
(y ello w)indic ator lam p *T
he redelect ric pa rking brak eindic ator lam pflashes orislit.
The yello welect ric pa rking brak eindic ator lam palso lightsup intheeve ntofama lfunctio n. #
Notethemessag eson themultifunc tiondispla y. Dis
play messa gesand warning/ indic ator lam ps 399

Dr
ivin gsy stems Wa
rning/indicat orlam p
Possible causes/conseq uencesand0050 0050
Solutions
00D4 Ac tiveBr ak eAssi stwa rning
lam p *T
he whit eAc tiveBr ak eAssi stwa rning lam pis lit.
The system isswitc hedoffor una vailable.
L Wa rning lam pfo rdis tance
wa rning func tion *T
he reddis tance warning lam plight sup while theve hicle isin mo tion.
The distance totheve hicle infront istoosmall forth espeed selected.
If th er eis an additional warning tone, youar eappr oachingan obs tacle attoohigh aspeed. #
Beprepar edtobrak eimmediat ely. #
Incr ease thedis tance.
Fu nctio nof ActiveBr ak eAssi st(/ pag e18 5).
ä Sus pens ion wa rning lam p
(y ello w) *T
he yello wAIR BO DY CONTR OLwarning lam pis lit.
The yello wDY NA MIC BODY CONTR OLwarning lam pis lit.
A malfun ction has occurredin theAIR BODY CONTR OL.
A malfu nction hasoccur redin theDY NA MIC BODY CONTR OL. #
Notethemessag eson themultifunc tiondispla y. 402
Displa ymessag esand warning/ indic ator lam ps

Wa
rning/indicat orlam p
Possible causes/conseq uencesand0050 0050
Solutions
00E5 ESP ®
wa rning lam plight s
up *
The yello wES P®
wa rning lam pis lit while theengine isrunning .
ESP ®
is mal func tioning .
Ot her drivi ng systems anddriving safetysy stems (e.g. BAS)ma yal so be mal functi oning. #
Notethemessag eson themultifunc tiondispla y. &
WARNIN GRisk ofskid ding ifESP ®
is mal functi oning
If ESP ®
is mal functi oning,ESP ®
canno tcar ryout vehicle stabiliz ation.Inaddit ion,ot her driving safetysy stems
ar eswitc hedoff. #
Drive on car efull y. #
Have ESP ®
ch eckedat aqu alif ied spec ialistwo rkshop. 00BB
ESP ®
OFF warning lam p *
The yello wES P®
OFF warning lam pis lit while theengine isrunning .
ESP ®
is de acti vated.
Ot her driving systems anddriving safetysy stems mayalso beinoper ative. &
WARNIN GRisk ofskid ding whe ndr ivi ng with ESP ®
de acti vated
ESP ®
do es notact tostabiliz eth eve hicle. Theavailabilit yof fur ther driving safetysy stems isalso limited. #
Drive on car efull y. #
Dea ctivateESP ®
only foras long asthesituation requ ires. 40
4
Disp lay mess ages and warning/ indic ator lam ps

Wa
rning/indicat orlam p
Possible causes/conseq uencesand0050 0050
Solutions
0077 Ti re pressur emonit oring
sy stem warning lam plight s
up *T
he yello wtirepr essur emon itor ing system warning lam p(pr essur eloss/ malfun ction) islit.
The tirepr essur emon itor ing system has detected tirepr ess urelos sin at leas tone ofthetir es. &
WARNIN GRisk ofan acci dent dueto insuf ficie nttirepr ess ure
R The tires can burst.
R The tires can wearexc essiv elyand/or unevenly .
R The drivi ng charact eristic sas wellas thesteer ing and braking maybe greatl yim pair ed.
Yo uco uld then lose control of theve hicle. #
Obser vethere comme ndedtirepr ess ures. #
Adjus tth etir epr essur eif neces sary. #
Stop theve hicle inaccor dance withth etra ffic con dition s. #
Chec kth etir epr essur eand thetir es. 406
Displa ymessag esand warning/ indic ator lam ps

Genuin
epar ts........ ...................................... 20
Genuin ewo od (Car e).................................2 77
Glide mode...... ........................................... 154 H
Handbr ake
see Electr icpar king brak e
Handlin gch aract eristics (unus ual)....... ..299
HAND S-FREEAC CESS .................................. 74
Hazar dwa rning light s...............................1 15
Hazar doussubstances
Inf ormation .......................................... .... 23
Head airbag .................................................4 2
Head leve lheat ing(AIRSC ARF).................. 99
Head restra int
Fr ont (adjus tingmechanicall y)................ 93
Re ar (installin g/remo ving).......................9 4
Head-up Display
Ad jus ting disp lay el eme nts(on-bo ard
com puter)....... .................................... ..223
Ad jus ting thebr ightn ess(on-boar d
com puter).. ...... ................................. ....2 23 Fu
nctio n...<0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011> <0011001100110011001100110011001100110011001100110011001100110011
001100110011>222
Menu (on-bo ardcom puter)....... .......... .. 223
Oper ating thememor yfunc tion............ 104
Se tting theposition (on-boar dcom‐
put er)....................................................2 23
Switc hingon/of f.<0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
00110011> 224
Hea dlam ps
see Automatic driving lights
Headlin er(car e)..... ....................................2 77
Heating see Climat econtr ol
Help call
see Mercedes-Benz emergencycallsystem
High beam
Ac tivati ng/d eactiv ating........... ..............114
High-be amflasher .....................................114
High-be amheadlam ps
Ad aptiveHig hbeam Assis t............... ...... 118
Ad aptiveHig hbeam Assis tPlus ........ ...... 119
Highw aymode ........... ............ ....................117
Hill star tassi st<0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011> 169 HOLD
functio n
Fu nctio n/no tes.<0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
0011001100110011> 168
Swi tching on/of f.<0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
00110011> 169
Home screen (media display)
Ov ervie w... ...... ...................................... 226
Hood Opening/clo sing................................... 265 I
Iden tificatio nplat e
Engine ................................................... 332
Re frig er ant....... .....................................3 39
Ve hicle. .................................................3 32
Ign itio n
Switc hingon(Start/S topbutt on).......... 137
Ignit ionkey
see Smar tKey
Imm obiliz er..................................................8 6
Indi catorlam ps
see Warning/ indic ator lam ps
Individ ualdrive pr og ram
Con figur ing.. .......................................... 150
Sel ecting <0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
001100110011001100110011001100110011001100110011001100110011> 150 Inde
x42
1

Insid
ere ar vie wmir ror
see Exterior mir rors
Insp ectio n
see ASSYST PLUS
Ins trument cluster
Fu nctio n/no tes.<0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011> 218, 219
Ins trum ent Disp lay
Fu nctio n/no tes.<0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
00110011001100110011> 219
Ins trument cluster.<0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
00110011> 10
Wa rning/ indic ator lam ps.................. .... 392
Ins trum ent Displa yand on-boa rd
com puter
Fu nctio n/no tes.<0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
00110011001100110011> 218
Int ellig entLight System
Ac tivati ng/d eactiv ating........... ..............117
Ac tivelight functio n.<0011001100110011001100110011001100110011001100110011001100110011
00110011001100110011001100110011001100110011001100110011> 116
Ad aptiveHig hbeam Assis t..................... 118
Ad aptiveHig hbeam Assis tPlus ........ ...... 119
Ad versewe ather light ...................... ...... 117
City lighting...................................... ...... 117
Cor nering light..... <0011001100110011001100110011001100110011001100110011001100110011
001100110011001100110011001100110011> .........116
Fo glight (extended rang e)<0011001100110011001100110011001100110011001100110011001100110011
00110011001100110011> 117
High waymod e.<0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
001100110011001100110011> 117
Ov ervie w.. ..............................................1 16 Int
erior ligh ting
Ad jus ting ............. ..................................121
Ambi entlighti ng.......... <0011001100110011001100110011001100110011001100110011001100110011
0011001100110011> ......122
Re adin glam p.<0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
00110011001100110011001100110011> 121
Swi tch-of fdel aytim e..... ........... .............122
Int erne tra dio
see TuneIn
Io nizatio n
Ac tivati ng/d eactiv ating (MBUX mul‐
tim ediasystem) ................................. ....1 33
iPho ne®
see Smar tphone integr atio n J
Jac k
St or ag elocation. ................................... 322
Jum p-startconnec tion
Gener alno tes.. ...................................... 288 K
KEYLESS- GO
Loc kingth eve hicle ..................................7 0
Pr oblem. .................................................. 71
Un loc kin gse tting.... .................................6 7 Un
loc kin gth eve hicle.... .......................... 70
Kic kdo wn
Using... .................................................. 154
Knee airbag .................................................. 42 L
Label ing(tires)
see Tire labeling
Lam p
see Interior light ing
Lam ps(Ins trum ent Displa y)
see Warning/ indic ator lam ps
Lane detection (automatic )
se eAc tiveLa ne Keeping Assist
Lane Keeping Assist
see ActiveLa ne Keeping Assist
LA TC H-type (ISOFI X)child seat secur‐
ing system
In stallin g.................................................. 56
Le velcontr olsystem
see AIR BO DY CONT ROL
Light switch
Ov ervie w................................................1 13 422
Index

0049
Electricpa rking brak eindic ator
lam p(red) (USAonl y)............................3 99
003D Electricalmalfunction warning
lam p.................................................. .... 398
00B9 Engine diagno siswarning lam p....3 97
00BB ESP®
OFF warning lam p...............4 04
00E5 ESP®
wa rning lam pflashes .......... 403
00E5 ESP®
wa rning lam plight sup ........ 404
00B6 Fuelreser vewarning lam p
fl ashes ...................................................3 98
00B6 Fuelreser vewarning lam p
light sup. ...............................................3 98
Ù Powe rst eer ing warning lam p
(r ed) ........................ .............................. 395
00C6 Recup erati ve Brak eSy stem
wa rning lam p(US Aonl y)....................... 400
0075 Restra int system warning lam p....3 94
00E9 Seatbel twa rning lam pflashes .... 394
00E9 Seatbeltwarning lam plight s
up. .................................................... .....3 95 ä
Suspe nsionwarning lam p(yel‐
lo w). ...................................................... 402
0024 Theelect ric pa rking brak e(yel‐
lo w) indic ator lam p.<0011001100110011001100110011001100110011001100110011001100110011
001100110011001100110011001100110011001100110011001100110011> 399
0077 Tire pressur emonit oring sys‐
te m wa rning lam pflashes .....................4 05
0077 Tire pressur emonit oring sys‐
te m wa rning lam plight sup. .................. 406
L Warning lam pfo rdis tance
wa rning func tion. .............................. .... 402
Wa rning/indicat orlam ps
Ov ervie w.. ........................................ .....3 92
PA SSENGER AIRBAG.<0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011> 47
Wa rranty ...................................................... 29
Wa sher fluid
see Windsh ield wa sher fluid
Wa shing byhand (care)...... ...................... 272
Wa terta nk
see Air-water duct
We ather information ................................. 240 We
bbr ow ser
Ov ervie w(multimedia system) .............. 250
Wheel chang e
Lo we ring theve hicle. ............................3 27
Mounting ane wwheel... ....................... 326
Re mo ving awhee l.<0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011> 326
Re mo ving/ins talling hubcaps ...............3 23
Whee lro tat ion. .......................................... 322
Wh eels
Car e.......................................................2 76
Chan ginghub caps ................................ 323
Chec king............................................... 299
Chec kingth etir epr essur e(manually) ...303
Chec kingthetir epr essur e(tir epr es‐
sur emonit oring system).. ......................3 05
Def initio ns....... ......................................316
DO T,Tire Identif ication Number (TIN).... 312
Fla ttir <0048001100110011001100110011001100110011001100110011001100110011
001100110011001100110011001100110011> <0011001100110011001100110011001100110011001100110011001100110011
0011>.........280
Ins talling. ...............................................3 26
Load index.............................................3 14
Load-be aring capaci ty.... ........................ 314
Maximum tireload... .............................. 313
Maximum tirepr essur e.... ......................3 13
MOExt ended tires...... ............................2 81
No ise.. ...................................................2 99 436
Index